Problem is - there are MULTIPLE ways to skin this cat. Example for us was, we have the un-throtled / unlimited T-mo LTE plan. can you imagine this plan, and you're letting the whole neighborhood piggyback off your wifi? VERY unfair ... so you can see why T-Mo wants to block some folks (like us). We found our international 8" Galaxy tab S had no issues (except getting it to run on a t-mo lte radio) with being block by default. But our T-MO Galaxy Note 3 was a diffrent story ... it took TONS of gymnastics to unblock T-Mo's wifi teather block. Funny thing; we only needed to let others use our wifi for a few days, than we'd be back to less than 12gb/month. that's just the way it goes sometimes.
Bottom line - every device may respond to unblocking differently . . . . that's why there are so many different suggestions on how to skin the cat. We tried numerous methods prior to enabling our note 3. After 8 attempts, number 9 worked for us. We had to (root, then) freeze T-Mo's stock wifi setup, than purchase one of several app store programs. After trying many of them ... it was the "wifi teather router" one that worked for us.